KE 852 then RS 381 at Incheon
Beijing Capital → Seoul → Osaka
Timetable, Seoul time
21:55KE 852 from Beijing Capital at the gate
15:20RS 381 to Osaka leaves the gate
17 h 25 apart on the timetable, overnight
RS 381 leaves 17 h 25 after KE 852 arrives on the timetable: more than half a day, so not a connection we count.